Dimensions of Pa-s is =[ML−1T−2]⋅[T] =[ML−1T−1] Dimensions of NmK−1 is =[MLT−2][L][K−1. =[ML2T−2K−1] Dimensions of Jkg−1K−1 =[ML2T−2][M]−1[K]−1 =[L2T−2K−1] Dimensions of Wm−1K−1 =[ML2T−3][L]−1[K]−1 =[MLT−3K−1] So, the correct matching is (iii), (iv), (i), (ii), hence the answer is (d).